The answer is D!
It’s not about notes, it’s about the different parts of the music. ABA is actually ternary form, which means that there are three parts:
A. The beginning melody
B. The middle, and a new melody
A. The beginning melody, rephrased.
Think of twinkle twinkle little star. “Twinkle twinkle little star, how I wonder what you are” is A
“Up above the world so high..” and so on is B
The repeat of “twinkle twinkle” from the beginning is A rephrased.
The example may seems childish, but nursery rhymes are an easy way to remember a complicated music theory terms, and you probably already know it by heart!
